ESP8266 AT指令开发篇（三）

通过51单片机、Arduino等实现AT指令配置8266模块，主要是通过串口通信实现的，博主学校的时候用的是51单片机给8266配置，arduino等原理相同，但是通过这种方法配置8266不是很稳定，会出现莫名重启等错误，也有可能是我外围电路没有去设计的原因。

本次主要涉及到的AT指令如下

//ATE0  关闭回显
uchar code closeBack[6]={0x41,0x54,0x45,0x30,0x0D,0x0A};

//AT+UART=9600,0,0,0  设置UART串口模式
uchar code setUART[20]={0x41,0x54,0x2B,0x55,0x41,0x52,0x54,0x3D,0x39,0x36,0x30,0x30,0x2C,0x30,0x2C,0x30,0x2C,0x30,0x0D,0x0A};

//AT+CWMODE=1  设置成Station模式
uchar code setStationMode[13]={0x41,0x54,0x2B,0x43,0x57,0x4D,0x4F,0x44,0x45,0x3D,0x31,0x0D,0x0A};

//AT+CWJAP="ccc","455455455"  连接WIFI
uchar code linkWifi[28]={0x41,0x54,0x2B,0x43,0x57,0x4A,0x41,0x50,0x3D,0x22,0x63,0x63,0x63,0x22,0x2C,0x22,0x34,0x35,0x35,0x34,0x35,0x35,0x34,0x35,0x35,0x22,0x0D,0x0A};

//AT+CIPMUX=0  设置单路连接模式
uchar code setSingleLinkMode[13]={0x41,0x54,0x2B,0x43,0x49,0x50,0x4D,0x55,0x58,0x3D,0x30,0x0D,0x0A};

//AT+RST  重启
uchar code RST[8]={0x41,0x54,0x2B,0x52,0x53,0x54,0x0D,0x0A};

//AT+CIPSTART="TCP","192.168.199.134",8080  连接TCP服务器
uchar code linkTCPServe[42]={0x41,0x54,0x2B,0x43,0x49,0x50,0x53,0x54,0x41,0x52,0x54,0x3D,0x22,0x54,0x43,0x50,0x22,0x2C,0x22,0x31,0x39,0x32,0x2E,0x31,0x36,0x38,0x2E,0x31,0x39,0x39,0x2E,0x31,0x33,0x34,0x22,0x2C,0x38,0x30,0x38,0x30,0x0D,0x0A};

//AT+CIPSEND=  发送数据
uchar code sendDate[11]={0x41,0x54,0x2B,0x43,0x49,0x50,0x53,0x45,0x4E,0x44,0x3D};

当然你也可以使用如下方式表示变量

//ATE0  关闭回显
uchar code closeBack[]="ATE0\r\n";

//AT+UART=9600,0,0,0  设置UART串口模式
uchar code setUART[]="AT+UART=9600,0,0,0\r\n";

//AT+CWMODE=1  设置成Station模式
uchar code setStationMode[]="AT+CWMODE=1\r\n";

//AT+CWJAP="ccc","455455455"  连接WIFI
uchar code linkWifi[]="AT+CWJAP=\"ccc\",\"455455455\"\r\n";

//AT+CIPMUX=0  设置单路连接模式
uchar code setSingleLinkMode[]="AT+CIPMUX=0";

//AT+RST  重启
uchar code RST[]="AT+RST";

//AT+CIPSTART="TCP","192.168.199.134",8080  连接TCP服务器
uchar code linkTCPServe[]="AT+CIPSTART=\"TCP\",\"192.168.199.134\",8080";

//AT+CIPSEND=  发送数据
uchar code sendDate[]="AT+CIPSEND=";

以上第一种方法要写个循环一个一个发，而第二种比较方便，可以直接使用printf()函数发送。

所用主要是模块作为station连接tcp服务器的一个过程，下面附上我学习时候写的代码，可能有比较多附加的东西，方便我当时调试执行到哪部了。

#include <reg52.h>
#include <stdio.h>

#define uchar unsigned char
#define uint unsigned int

/******************本地变量声明******************/
uchar Buffer;  //接收串口数据

/******************端口引脚定义******************/
sbit K1=P3^4;  //正转按键
sbit K2=P3^5;  //反转按键
sbit K3=P3^6;  //停止按键
sbit LED1=P1^0;  //正转灯
sbit LED2=P1^1;  //反转灯
sbit LED3=P1^2;  //停止灯
sbit LED4=P1^3;  //连接服务器成功
sbit sig=P2^1;
sbit led=P2^0;

/******************电机相序表定义******************/
uchar code CW[8]={0x01,0x03,0x02,0x06,0x04,0x0c,0x08,0x09};    //电机正时钟旋转相序表
uchar code CCW[8]={0x09,0x08,0x0c,0x04,0x06,0x02,0x03,0x01};   //电机逆时钟旋转相序表

/**********************ESP8266指令定义***********************
//ATE0  关闭回显
uchar code closeBack[6]={0x41,0x54,0x45,0x30,0x0D,0x0A};

//AT+UART=9600,0,0,0  设置UART串口模式
uchar code setUART[20]={0x41,0x54,0x2B,0x55,0x41,0x52,0x54,0x3D,0x39,0x36,0x30,0x30,0x2C,0x30,0x2C,0x30,0x2C,0x30,0x0D,0x0A};

//AT+CWMODE=1  设置成Station模式
uchar code setStationMode[13]={0x41,0x54,0x2B,0x43,0x57,0x4D,0x4F,0x44,0x45,0x3D,0x31,0x0D,0x0A};

//AT+CWJAP="ccc","455455455"  连接WIFI
uchar code linkWifi[28]={0x41,0x54,0x2B,0x43,0x57,0x4A,0x41,0x50,0x3D,0x22,0x63,0x63,0x63,0x22,0x2C,0x22,0x34,0x35,0x35,0x34,0x35,0x35,0x34,0x35,0x35,0x22,0x0D,0x0A};

//AT+CIPMUX=0  设置单路连接模式
uchar code setSingleLinkMode[13]={0x41,0x54,0x2B,0x43,0x49,0x50,0x4D,0x55,0x58,0x3D,0x30,0x0D,0x0A};

//AT+RST  重启
uchar code RST[8]={0x41,0x54,0x2B,0x52,0x53,0x54,0x0D,0x0A};

//AT+CIPSTART="TCP","192.168.199.134",8080  连接TCP服务器
uchar code linkTCPServe[42]={0x41,0x54,0x2B,0x43,0x49,0x50,0x53,0x54,0x41,0x52,0x54,0x3D,0x22,0x54,0x43,0x50,0x22,0x2C,0x22,0x31,0x39,0x32,0x2E,0x31,0x36,0x38,0x2E,0x31,0x39,0x39,0x2E,0x31,0x33,0x34,0x22,0x2C,0x38,0x30,0x38,0x30,0x0D,0x0A};

//AT+CIPSEND=  发送数据
uchar code sendDate[11]={0x41,0x54,0x2B,0x43,0x49,0x50,0x53,0x45,0x4E,0x44,0x3D};
********************ESP8266指令定义结束*********************/

/**********************ESP8266 AT指令定义***********************
//ATE0  关闭回显
uchar code closeBack[]="ATE0\r\n";

//AT+UART=9600,0,0,0  设置UART串口模式
uchar code setUART[]="AT+UART=9600,0,0,0\r\n";

//AT+CWMODE=1  设置成Station模式
uchar code setStationMode[]="AT+CWMODE=1\r\n";

//AT+CWJAP="ccc","455455455"  连接WIFI
uchar code linkWifi[]="AT+CWJAP=\"ccc\",\"455455455\"\r\n";

//AT+CIPMUX=0  设置单路连接模式
uchar code setSingleLinkMode[]="AT+CIPMUX=0";

//AT+RST  重启
uchar code RST[]="AT+RST";

//AT+CIPSTART="TCP","192.168.199.134",8080  连接TCP服务器
uchar code linkTCPServe[]="AT+CIPSTART=\"TCP\",\"192.168.199.134\",8080";

//AT+CIPSEND=  发送数据
uchar code sendDate[]="AT+CIPSEND=";
/********************ESP8266 AT指令定义结束*********************/

/******************延时函数******************/
void delay(uint x)
{
uint i,j;
for(i=0;i<x;i++)
for(j=0;j<110;j++);
}
/******************延时函数完毕******************/

/******************电机转动函数*******************/
int CW_motor()  //内部齿轮正转一圈
{
uint i,j,flag=0;  //flag为停止标识  1为停止  初始为0
for(i=0;i<8;i++)
{
for(j=0;j<8;j++)
{
if(K3==0||Buffer=='t')
{
flag=1;
break;
}
P1=CW[j];
delay(10);  //延时
}
if(flag==1)
break;
}
if(flag)
return 0;
else
return 1;
}
int CCW_motor()  //内部齿轮反转一圈
{
uint i,j,flag=0;  //flag为停止标识  1为停止  初始为0
for(i=0;i<8;i++)
{
for(j=0;j<8;j++)
{
if(K3==0||Buffer=='t')
{
flag=1;
break;
}
P1=CCW[j];
delay(10);  //延时
}
if(flag==1)
break;
}
if(flag)
return 0;
else
return 1;
}
/******************电机转动函数完毕******************/

/******************串口初始化******************/
void INIT()
{
TMOD = 0x20;  //设置定时器1工作在模式2
PCON = 0x00;
SCON = 0x50;
TL1 = 0xfd;
TH1 = 0xfd;  //设置波特率 9600
TR1 = 1;     //启动定时器1
ES = 1;      //开串口中断
EA = 1;      //开总中断
TI=1;        //printf()需TI=1
}
/******************串口初始化完毕******************/

/******************8266初始化******************/
void send_message(char *x)  //初始化8266 发送AT指令
{
uint a;
uint b,c,d,e;
b=c=d=e=1;
do
{
for (a = 0; a<5000; a++);
printf("%s",x);
do {
if (RI) {    //查询是否有数据接收
Buffer = SBUF;  //数据暂存于变量中
RI = 0;
if (Buffer == 'K')
{
b = 0;
d = 0;
}
c++;
if (c == 1000)  //重新发送
{
c = 1;
d = 0;
}
}
} while (d);
} while (b);
}
void INIT_8266()  //初始化8266
{
delay(2000);
send_message("ATE0\r\n");
delay(3000);
send_message("AT+UART=9600,0,0,0\r\n");
delay(3000);
send_message("AT+CWMODE=1\r\n");
delay(3000);
send_message("AT+CWJAP=\"ccc\",\"455455455\"\r\n");
delay(3000);
send_message("AT+CIPMUX=0\r\n");
delay(3000);
send_message("AT+RST\r\n");
delay(5000);
}
/******************8266初
4000
始化完毕******************/

/*
void Com_Int() interrupt 4
{
if(RI == 1)   			//当硬件接收到一个数据时，RI会置位
{
RI = 0;
Buffer=SBUF;
}
}
*/
void main()
{
uint N=64;  //28BYJ-48 5V DC 4线程步进电机 减速比为1：64
//及内部齿轮转64圈，最外部齿轮转1圈
uint i;
uint flag_motor=0;  //是否转动
LED1=LED2=1;
LED3=0;
LED4=1;
INIT();
//INIT_8266();
//led=1;
while(1)
{
/*if(K1==0)
{
while(K1==0);
send_message("AT+CIPSTART=\"TCP\",\"172.28.151.1\",8080");
LED4=0;
}
if(K2==0)
{
while(K2==0);
send_message("AT+CIPSEND=15\r\n");
while(K3!=0);
send_message("I can hear you!");
}*/
if(K1==0||Buffer=='z'||sig==1)
{
//while(K1==0);
/*send_message("zheng zhuang zhong...\n");
LED1=0;
LED3=1;*/
for(i=0;i<N;i++)
{
if(!CW_motor())
break;
}
//LED1=1;
//LED3=0;
}
if(K2==0||Buffer=='f')
{
/*send_message("fan zhuang zhong...\n");
while(K2==0);
LED2=0;
LED3=1;*/
for(i=0;i<N;i++)
{
if(!CCW_motor())
break;
}
//LED2=1;
//LED3=0;
}
Buffer=0;  //清空Buffer的值  至下一次串行中断再获取指令值
}
}

最后说几点，我用的是STC89C52RC的51单片机芯片，晶振是12MHz，非常坑...根本配不出9600的波特率，误差太大，所以AT指令发送各种鬼畜，当时也是图便宜买的8266-01的模块，模块的稳定性也可能有比较大的问题，而且刚买的8266模块的波特率不是9600，也忘记是多少了，所以不是十分推荐用这种方式，下次有空会更新固件开发的文章，希望可以帮到刚入的师弟师妹或者开发者。